Finding the Fourth Proportional to 81,399.98, 112,326 and 49,579.13

Step by Step Solution

1. Step 1: Write the proportion equation
   81,399.98 : 112,326 = 49,579.13 : x
2. Step 2: Convert to fraction form
   81,399.98/112,326 = 49,579.13/x
3. Step 3: Cross multiply
   81,399.98x = 112,326 × 49,579.13
4. Step 4: Simplify right side
   81,399.98x = 5,569,025,356.38
5. Step 5: Solve for x
   x = 5,569,025,356.38/81,399.98
6. Step 6: Final answer
   x = 68,415.56